Matching transformer



FIG. 1 is a top plan view of a matching transformer showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof; and

FIG. 5 is a front perspective view thereof.

The broken lines are shown for illustrative purposes only. 

The ornamental design for a matching transformer, substantially as shown and described. 